package/network/services/dnsmasq/files/dnsmasq.init

   1 #!/bin/sh /etc/rc.common
   2 # Copyright (C) 2007-2012 OpenWrt.org
   3
   4 START=60
   5
   6 SERVICE_USE_PID=1
   7
   8 DNS_SERVERS=""
   9 DOMAIN=""
  10
  11 ADD_LOCAL_DOMAIN=1
  12 ADD_LOCAL_HOSTNAME=1
  13
  14 CONFIGFILE="/var/etc/dnsmasq.conf"
  15
  16 xappend() {
  17         local value="$1"
  18
  19         echo "${value#--}" >> $CONFIGFILE
  20 }
  21
  22 dhcp_calc() {
  23         local ip="$1"
  24         local res=0
  25
  26         while [ -n "$ip" ]; do
  27                 part="${ip%%.*}"
  28                 res="$(($res * 256))"
  29                 res="$(($res + $part))"
  30                 [ "${ip%.*}" != "$ip" ] && ip="${ip#*.}" || ip=
  31         done
  32         echo "$res"
  33 }
  34
  35 append_bool() {
  36         local section="$1"
  37         local option="$2"
  38         local value="$3"
  39         local _loctmp
  40         config_get_bool _loctmp "$section" "$option" 0
  41         [ $_loctmp -gt 0 ] && xappend "$value"
  42 }
  43
  44 append_parm() {
  45         local section="$1"
  46         local option="$2"
  47         local switch="$3"
  48         local _loctmp
  49         config_get _loctmp "$section" "$option"
  50         [ -z "$_loctmp" ] && return 0
  51         xappend "$switch=$_loctmp"
  52 }
  53
  54 append_server() {
  55         xappend "--server=$1"
  56 }
  57
  58 append_address() {
  59         xappend "--address=$1"
  60 }
  61
  62 append_interface() {
  63         local ifname=$(uci_get_state network "$1" ifname "$1")
  64         xappend "--interface=$ifname"
  65 }
  66
  67 append_notinterface() {
  68         local ifname=$(uci_get_state network "$1" ifname "$1")
  69         xappend "--except-interface=$ifname"
  70 }
  71
  72 append_addnhosts() {
  73         xappend "--addn-hosts=$1"
  74 }
  75
  76 append_bogusnxdomain() {
  77     xappend "--bogus-nxdomain=$1"
  78 }
  79
  80 dnsmasq() {
  81         local cfg="$1"
  82         append_bool "$cfg" authoritative "--dhcp-authoritative"
  83         append_bool "$cfg" nodaemon "--no-daemon"
  84         append_bool "$cfg" domainneeded "--domain-needed"
  85         append_bool "$cfg" filterwin2k "--filterwin2k"
  86         append_bool "$cfg" nohosts "--no-hosts"
  87         append_bool "$cfg" nonegcache "--no-negcache"
  88         append_bool "$cfg" strictorder "--strict-order"
  89         append_bool "$cfg" logqueries "--log-queries"
  90         append_bool "$cfg" noresolv "--no-resolv"
  91         append_bool "$cfg" localise_queries "--localise-queries"
  92         append_bool "$cfg" readethers "--read-ethers"
  93         append_bool "$cfg" dbus "--enable-dbus"
  94         append_bool "$cfg" boguspriv "--bogus-priv"
  95         append_bool "$cfg" expandhosts "--expand-hosts"
  96         append_bool "$cfg" enable_tftp "--enable-tftp"
  97         append_bool "$cfg" nonwildcard "--bind-interfaces"
  98         append_bool "$cfg" fqdn "--dhcp-fqdn"
  99         append_bool "$cfg" proxydnssec "--proxy-dnssec"
 100
 101         append_parm "$cfg" dhcpscript "--dhcp-script"
 102         append_parm "$cfg" cachesize "--cache-size"
 103         append_parm "$cfg" dnsforwardmax "--dns-forward-max"
 104         append_parm "$cfg" port "--port"
 105         append_parm "$cfg" ednspacket_max "--edns-packet-max"
 106         append_parm "$cfg" dhcpleasemax "--dhcp-lease-max"
 107         append_parm "$cfg" "queryport" "--query-port"
 108         append_parm "$cfg" "domain" "--domain"
 109         append_parm "$cfg" "local" "--server"
 110         config_list_foreach "$cfg" "server" append_server
 111         config_list_foreach "$cfg" "address" append_address
 112         config_list_foreach "$cfg" "interface" append_interface
 113         config_list_foreach "$cfg" "notinterface" append_notinterface
 114         config_list_foreach "$cfg" "addnhosts" append_addnhosts
 115         config_list_foreach "$cfg" "bogusnxdomain" append_bogusnxdomain
 116         append_parm "$cfg" "leasefile" "--dhcp-leasefile"
 117         append_parm "$cfg" "resolvfile" "--resolv-file"
 118         append_parm "$cfg" "tftp_root" "--tftp-root"
 119         append_parm "$cfg" "dhcp_boot" "--dhcp-boot"
 120         append_parm "$cfg" "local_ttl" "--local-ttl"
 121
 122         config_get DOMAIN "$cfg" domain
 123
 124         config_get_bool ADD_LOCAL_DOMAIN "$cfg" add_local_domain 1
 125         config_get_bool ADD_LOCAL_HOSTNAME "$cfg" add_local_hostname 1
 126
 127         config_get_bool readethers "$cfg" readethers
 128         [ "$readethers" = "1" -a \! -e "/etc/ethers" ] && touch /etc/ethers
 129
 130         config_get leasefile $cfg leasefile
 131         [ -n "$leasefile" -a \! -e "$leasefile" ] && touch "$leasefile"
 132         config_get_bool cachelocal "$cfg" cachelocal 1
 133
 134         config_get hostsfile "$cfg" dhcphostsfile
 135         [ -e "$hostsfile" ] && xappend "--dhcp-hostsfile=$hostsfile"
 136
 137         mkdir -p /tmp/hosts
 138         xappend "--addn-hosts=/tmp/hosts"
 139
 140         local rebind
 141         config_get_bool rebind "$cfg" rebind_protection 1
 142         [ $rebind -gt 0 ] && {
 143                 logger -t dnsmasq \
 144                         "DNS rebinding protection is active," \
 145                         "will discard upstream RFC1918 responses!"
 146                 xappend "--stop-dns-rebind"
 147
 148                 local rebind_localhost
 149                 config_get_bool rebind_localhost "$cfg" rebind_localhost 0
 150                 [ $rebind_localhost -gt 0 ] && {
 151                         logger -t dnsmasq "Allowing 127.0.0.0/8 responses"
 152                         xappend "--rebind-localhost-ok"
 153                 }
 154
 155                 append_rebind_domain() {
 156                         logger -t dnsmasq "Allowing RFC1918 responses for domain $1"
 157                         xappend "--rebind-domain-ok=$1"
 158                 }
 159
 160                 config_list_foreach "$cfg" rebind_domain append_rebind_domain
 161         }
 162
 163         dhcp_option_add "$cfg" "" 0
 164
 165         echo >> $CONFIGFILE
 166 }
 167
 168 dhcp_subscrid_add() {
 169         local cfg="$1"
 170
 171         config_get networkid "$cfg" networkid
 172         [ -n "$networkid" ] || return 0
 173
 174         config_get subscriberid "$cfg" subscriberid
 175         [ -n "$subscriberid" ] || return 0
 176
 177         xappend "--dhcp-subscrid=$networkid,$subscriberid"
 178
 179         config_get_bool force "$cfg" force 0
 180
 181         dhcp_option_add "$cfg" "$networkid" "$force"
 182 }
 183
 184 dhcp_remoteid_add() {
 185         local cfg="$1"
 186
 187         config_get networkid "$cfg" networkid
 188         [ -n "$networkid" ] || return 0
 189
 190         config_get remoteid "$cfg" remoteid
 191         [ -n "$remoteid" ] || return 0
 192
 193         xappend "--dhcp-remoteid=$networkid,$remoteid"
 194
 195         config_get_bool force "$cfg" force 0
 196
 197         dhcp_option_add "$cfg" "$networkid" "$force"
 198 }
 199
 200 dhcp_circuitid_add() {
 201         local cfg="$1"
 202
 203         config_get networkid "$cfg" networkid
 204         [ -n "$networkid" ] || return 0
 205
 206         config_get circuitid "$cfg" circuitid
 207         [ -n "$circuitid" ] || return 0
 208
 209         xappend "--dhcp-circuitid=$networkid,$circuitid"
 210
 211         config_get_bool force "$cfg" force 0
 212
 213         dhcp_option_add "$cfg" "$networkid" "$force"
 214 }
 215
 216 dhcp_userclass_add() {
 217         local cfg="$1"
 218
 219         config_get networkid "$cfg" networkid
 220         [ -n "$networkid" ] || return 0
 221
 222         config_get userclass "$cfg" userclass
 223         [ -n "$userclass" ] || return 0
 224
 225         xappend "--dhcp-userclass=$networkid,$userclass"
 226
 227         config_get_bool force "$cfg" force 0
 228
 229         dhcp_option_add "$cfg" "$networkid" "$force"
 230 }
 231
 232 dhcp_vendorclass_add() {
 233         local cfg="$1"
 234
 235         config_get networkid "$cfg" networkid
 236         [ -n "$networkid" ] || return 0
 237
 238         config_get vendorclass "$cfg" vendorclass
 239         [ -n "$vendorclass" ] || return 0
 240
 241         xappend "--dhcp-vendorclass=$networkid,$vendorclass"
 242
 243         config_get_bool force "$cfg" force 0
 244
 245         dhcp_option_add "$cfg" "$networkid" "$force"
 246 }
 247
 248 dhcp_host_add() {
 249         local cfg="$1"
 250
 251         config_get_bool force "$cfg" force 0
 252
 253         config_get networkid "$cfg" networkid
 254         [ -n "$networkid" ] && dhcp_option_add "$cfg" "$networkid" "$force"
 255
 256         config_get name "$cfg" name
 257         config_get ip "$cfg" ip
 258         [ -n "$ip" -o -n "$name" ] || return 0
 259
 260         config_get mac "$cfg" mac
 261         [ -z "$mac" ] && {
 262                 [ -n "$name" ] || return 0
 263                 mac="$name"
 264                 name=""
 265         }
 266
 267         macs=""
 268         for m in $mac; do append macs "$m" ","; done
 269
 270         config_get tag "$cfg" tag
 271
 272         xappend "--dhcp-host=$macs${networkid:+,net:$networkid}${tag:+,set:$tag}${ip:+,$ip}${name:+,$name}"
 273 }
 274
 275 dhcp_tag_add() {
 276         local cfg="$1"
 277
 278         tag="$cfg"
 279
 280         [ -n "$tag" ] || return 0
 281
 282         config_get_bool force "$cfg" force 0
 283         [ "$force" = "0" ] && force=
 284
 285         config_get option "$cfg" dhcp_option
 286         for o in $option; do
 287                 xappend "--dhcp-option${force:+-force}=tag:$tag,$o"
 288         done
 289 }
 290
 291 dhcp_mac_add() {
 292         local cfg="$1"
 293
 294         config_get networkid "$cfg" networkid
 295         [ -n "$networkid" ] || return 0
 296
 297         config_get mac "$cfg" mac
 298         [ -n "$mac" ] || return 0
 299
 300         xappend "--dhcp-mac=$networkid,$mac"
 301
 302         dhcp_option_add "$cfg" "$networkid"
 303 }
 304
 305 dhcp_boot_add() {
 306         local cfg="$1"
 307
 308         config_get networkid "$cfg" networkid
 309
 310         config_get filename "$cfg" filename
 311         [ -n "$filename" ] || return 0
 312
 313         config_get servername "$cfg" servername
 314         [ -n "$servername" ] || return 0
 315
 316         config_get serveraddress "$cfg" serveraddress
 317         [ -n "$serveraddress" ] || return 0
 318
 319         xappend "--dhcp-boot=${networkid:+net:$networkid,}$filename,$servername,$serveraddress"
 320
 321         config_get_bool force "$cfg" force 0
 322
 323         dhcp_option_add "$cfg" "$networkid" "$force"
 324 }
 325
 326
 327 dhcp_add() {
 328         local cfg="$1"
 329         config_get net "$cfg" interface
 330         [ -n "$net" ] || return 0
 331
 332         config_get networkid "$cfg" networkid
 333         [ -n "$networkid" ] || networkid="$net"
 334
 335         config_get ifname "$net" ifname
 336         [ -n "$ifname" ] || return 0
 337
 338         config_get dnsserver "$net" dns
 339         [ "$cachelocal" = "0" -a -n "$dnsserver" ] && {
 340                 DNS_SERVERS="$DNS_SERVERS $dnsserver"
 341         }
 342
 343         append_bool "$cfg" ignore "--no-dhcp-interface=$ifname" && return 0
 344
 345         config_get proto "$net" proto
 346         [ static = "$proto" ] || return 0
 347
 348         config_get ipaddr "$net" ipaddr
 349         config_get netmask "$cfg" netmask
 350         [ -n "$netmask" ] || config_get netmask "$net" netmask
 351
 352         #check for an already active dhcp server on the interface, unless 'force' is set
 353         config_get_bool force "$cfg" force 0
 354         [ $force -gt 0 ] || {
 355                 udhcpc -n -q -s /bin/true -t 1 -i $ifname >&- && {
 356                         logger -t dnsmasq \
 357                                 "found already running DHCP-server on interface '$ifname'" \
 358                                 "refusing to start, use 'option force 1' to override"
 359                         return 0
 360                 }
 361         }
 362
 363         config_get start "$cfg" start
 364         config_get limit "$cfg" limit
 365         config_get leasetime "$cfg" leasetime
 366         config_get options "$cfg" options
 367         config_get_bool dynamicdhcp "$cfg" dynamicdhcp 1
 368
 369         leasetime="${leasetime:-12h}"
 370         start="$(dhcp_calc "${start:-100}")"
 371         limit="${limit:-150}"
 372         [ "$limit" -gt 0 ] && limit=$((limit-1))
 373         eval "$(ipcalc.sh $ipaddr $netmask $start $limit)"
 374         if [ "$dynamicdhcp" = "0" ]; then END="static"; fi
 375         xappend "--dhcp-range=$networkid,$START,$END,$NETMASK,$leasetime${options:+ $options}"
 376
 377         dhcp_option_add "$cfg" "$networkid"
 378 }
 379
 380 dhcp_option_add() {
 381         local cfg="$1"
 382         local networkid="$2"
 383         local force="$3"
 384
 385         [ "$force" = "0" ] && force=
 386
 387         config_get dhcp_option "$cfg" dhcp_option
 388         for o in $dhcp_option; do
 389                 xappend "--dhcp-option${force:+-force}=${networkid:+$networkid,}$o"
 390         done
 391
 392 }
 393
 394 dhcp_domain_add() {
 395         local cfg="$1"
 396         local ip name names record
 397
 398         config_get names "$cfg" name "$2"
 399         [ -n "$names" ] || return 0
 400
 401         config_get ip "$cfg" ip "$3"
 402         [ -n "$ip" ] || return 0
 403
 404         for name in $names; do
 405                 record="${record:+$record/}$name"
 406         done
 407
 408         xappend "--address=/$record/$ip"
 409 }
 410
 411 dhcp_srv_add() {
 412         local cfg="$1"
 413
 414         config_get srv "$cfg" srv
 415         [ -n "$srv" ] || return 0
 416
 417         config_get target "$cfg" target
 418         [ -n "$target" ] || return 0
 419
 420         config_get port "$cfg" port
 421         [ -n "$port" ] || return 0
 422
 423         config_get class "$cfg" class
 424         config_get weight "$cfg" weight
 425
 426         local service="$srv,$target,$port${class:+,$class${weight:+,$weight}}"
 427
 428         xappend "--srv-host=$service"
 429 }
 430
 431 dhcp_mx_add() {
 432         local cfg="$1"
 433         local domain relay pref
 434
 435         config_get domain "$cfg" domain
 436         [ -n "$domain" ] || return 0
 437
 438         config_get relay "$cfg" relay
 439         [ -n "$relay" ] || return 0
 440
 441         config_get pref "$cfg" pref 0
 442
 443         local service="$domain,$relay,$pref"
 444
 445         xappend "--mx-host=$service"
 446 }
 447
 448 dhcp_cname_add() {
 449         local cfg="$1"
 450         local cname target
 451
 452         config_get cname "$cfg" cname
 453         [ -n "$cname" ] || return 0
 454
 455         config_get target "$cfg" target
 456         [ -n "$target" ] || return 0
 457
 458         xappend "--cname=${cname},${target}"
 459 }
 460
 461 dhcp_hostrecord_add() {
 462         local cfg="$1"
 463         local names addresses record val
 464
 465         config_get names "$cfg" name "$2"
 466         if [ -z "$names" ]; then
 467                 return 0
 468         fi
 469
 470         config_get addresses "$cfg" ip "$3"
 471         if [ -z "$addresses" ]; then
 472                 return 0
 473         fi
 474
 475         for val in $names $addresses; do
 476                 record="${record:+$record,}$val"
 477         done
 478
 479         xappend "--host-record=$record"
 480 }
 481
 482 start() {
 483         include /lib/network
 484         scan_interfaces
 485
 486         local lanaddr
 487         config_get lanaddr "lan" ipaddr
 488
 489         config_load dhcp
 490
 491         # before we can call xappend
 492         mkdir -p $(dirname $CONFIGFILE)
 493
 494         echo "# auto-generated config file from /etc/config/dhcp" > $CONFIGFILE
 495
 496         # if we did this last, we could override auto-generated config
 497         [ -f /etc/dnsmasq.conf ] && {
 498                 xappend "--conf-file=/etc/dnsmasq.conf"
 499         }
 500
 501         args=""
 502         config_foreach dnsmasq dnsmasq
 503         config_foreach dhcp_host_add host
 504         echo >> $CONFIGFILE
 505         config_foreach dhcp_boot_add boot
 506         config_foreach dhcp_mac_add mac
 507         config_foreach dhcp_tag_add tag
 508         config_foreach dhcp_vendorclass_add vendorclass
 509         config_foreach dhcp_userclass_add userclass
 510         config_foreach dhcp_circuitid_add circuitid
 511         config_foreach dhcp_remoteid_add remoteid
 512         config_foreach dhcp_subscrid_add subscrid
 513         config_foreach dhcp_domain_add domain
 514         config_foreach dhcp_hostrecord_add hostrecord
 515
 516         # add own hostname
 517         [ $ADD_LOCAL_HOSTNAME -eq 1 ] && [ -n "$lanaddr" ] && {
 518                 local hostname="$(uci_get system @system[0] hostname OpenWrt)"
 519                 dhcp_hostrecord_add "" "$hostname${DOMAIN:+.$DOMAIN $hostname}" "$lanaddr"
 520         }
 521
 522         echo >> $CONFIGFILE
 523         config_foreach dhcp_srv_add srvhost
 524         config_foreach dhcp_mx_add mxhost
 525         echo >> $CONFIGFILE
 526         config_foreach dhcp_add dhcp
 527         echo >> $CONFIGFILE
 528         config_foreach dhcp_cname_add cname
 529         echo >> $CONFIGFILE
 530
 531         service_start /usr/sbin/dnsmasq -C $CONFIGFILE && {
 532                 rm -f /tmp/resolv.conf
 533                 [ $ADD_LOCAL_DOMAIN -eq 1 ] && [ -n "$DOMAIN" ] && {
 534                         echo "search $DOMAIN" >> /tmp/resolv.conf
 535                 }
 536                 DNS_SERVERS="$DNS_SERVERS 127.0.0.1"
 537                 for DNS_SERVER in $DNS_SERVERS ; do
 538                         echo "nameserver $DNS_SERVER" >> /tmp/resolv.conf
 539                 done
 540         }
 541 }
 542
 543 stop() {
 544         service_stop /usr/sbin/dnsmasq && {
 545                 [ -f /tmp/resolv.conf ] && {
 546                         rm -f /tmp/resolv.conf
 547                         ln -s /tmp/resolv.conf.auto /tmp/resolv.conf
 548                 }
 549         }
 550 }